Abstract: An aspect of the present invention relates to hexagonal ferrite powder, which comprises equal to or more than 70% on a particle number basis of isotropic hexagonal ferrite particles satisfying equation (1): major axis length/minor axis length<2.0??(1), having an average particle size of equal to or greater than 10.0 nm but equal to or less than 35.0 nm, and having a saturation magnetization of equal to or greater than 30 A·m2/kg.

Abstract: A filler for filling a gap includes a compound represented by the following Chemical Formula 1. SiaNbOcHd.??[Chemical Formula 1] In Chemical Formula 1, a, b, c, and d represent relative amounts of Si, N, 0, and H, respectively, in the compound, 1.96<a<2.68, 1.78<b<3.21, 0?c<0.19, and 4<d<10.

Abstract: A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within nanotubes (e.g., carbon nanotubes), which are arranged in a substrate to facilitate the reading and writing of information by a read/write head. The substrate may be flexible or rigid. Information is stored on the magnetic nanoparticles via the read/write head of a storage device. These magnetic nanoparticles are arranged into data tracks to store information through encapsulation within the carbon nanotubes. As carbon nanotubes are bendable, the carbon nanotubes may be arranged on flexible or rigid substrates, such as a polymer tape or disk for flexible media, or a glass substrate for rigid disk. A polymer may assist holding the nanoparticle filled carbon-tubes to the substrate.

Abstract: The present invention relates to a magnetic recording medium comprising a magnetic layer comprising a hexagonal ferrite powder and a binder on one surface of a nonmagnetic support and a backcoat layer on the other surface of the nonmagnetic support. A power spectrum density at a pitch of 10 micrometers ranges from 800 to 10,000 nm3 on the magnetic layer surface, a power spectrum density at a pitch of 10 micrometers ranges from 20,000 to 80,000 nm3 on the backcoat layer surface, the magnetic layer has a center surface average surface roughness Ra, as measured by an atomic force microscope, ranging from 0.5 to 2.5 nm, and the hexagonal ferrite powder has an average plate diameter ranging from 10 to 40 nm.

Abstract: A filler for filling a gap includes a hydrogenated polysiloxazane having an oxygen content of about 0.2 to about 3 wt %. A chemical structure of the hydrogenated polysiloxazane includes first, second, and third moieties represented by the following respective Chemical Formulas 1-3: The third moiety is on a terminal end of the hydrogenated polysiloxazane, and an amount of the third moiety is about 15 to about 35% based on a total amount of Si—H bonds in the hydrogenated polysiloxazane.

Abstract: The present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on one surface of a nonmagnetic support and a backcoat layer comprising a granular material and a binder on the other surface of the nonmagnetic support, wherein the backcoat layer has an average surface roughness ranging from 15 to 25 nm, as measured by an atomic force microscope, and a density of protrusions equal to or greater than 50 nm in height ranges from 1 to 50/mm2 on the backcoat layer surface, as measured by a three-dimensional surface roughness meter with a contact needle. The present invention further relates to a method of reproducing magnetic signals and a magnetic signal reproduction system.

Abstract: A magnetic tape medium having superior dimensional stability in the width direction and off-track resistance is provided although having a very high track width in the width direction. As a non-magnetic substrate of a magnetic tape medium in which the track density in the width direction is 50 tracks/mm or more, the off-track margin is 5 ?m or less, and the maximum permissible amount of change in dimension in the width direction caused by environment factors is 0.10% or less, a laminate composed of a plastic film and films provided on two surfaces thereof is used, the films being formed of a material selected from the group including a metal, a semi-metal, an alloy, and an oxide or composite formed of the aforementioned material, having a Young's modulus of 7×103 kg/mm2 or more and a coefficient of thermal expansion of 18×10?6/° C. or less.

Abstract: An objective is to provide an electromagnetic wave shielding material exhibiting an excellent electromagnetic wave shielding property, and also to provide a manufacturing method with quick and simple processing, in which a thin-line-state picture image can easily be formed. An electromagnetic wave shielding material exhibiting an excellent near-infrared shielding property can further be provided if desired. Disclosed is an electromagnetic wave shielding material possessing a support and provided thereon, a conductive metal layer, wherein the conductive metal layer satisfies at least one of the following conditions; (1) a void ratio of the conductive metal layer is 0.1-15%, (2) Glossiness of the conductive metal layer is 50-300%, and (3) Center line average surface roughness (Ra) of the conductive metal layer is 1-50 nm.

Abstract: A magnetic recording medium including: a back coat layer; a nonmagnetic support; and coated layers including: a nonmagnetic layer containing nonmagnetic powder and a binder; and a magnetic layer containing ferromagnetic powder and a binder, so that the back coat layer, the nonmagnetic support, the nonmagnetic layer and the magnetic layer are provided in this order, wherein the ferromagnetic powder is ferromagnetic hexagonal ferrite powder having an average tabular size of less than 30 nm, and a central plane surface roughness Ra of the magnetic layer, a central plane surface roughness Ra of the back coat layer, a glass transition point of the coated layers, a glass transition point of the back coat layer and a ratio of a Young's modulus of the magnetic layer to a Young's modulus of the back coat layer are defined herein.

Abstract: A method for manufacturing a magnetic tape includes the steps of feeding a broad magnetic tape including a broad support formed with a magnetic recording layer on one side thereof and a back coat layer on the other surface thereof to a portion between a disk-like upper blade and a disk-like lower blade overlapping each other and rotating in opposite directions and cutting the broad magnetic tape into magnetic tapes each having a predetermined width, which method for manufacturing a magnetic tape further includes a step of setting a cutting start angle between the disk-like upper blade and the disk-like lower blade overlapping each other and rotating in opposite directions at the time that cutting of the broad magnetic tape fed to a portion between the upper blade and the lower blade by the upper blade and the lower blade is started so that a lower blade side cut surface of the magnetic tape to be formed by cutting the broad magnetic tape includes 40% to 65% of a region formed by cutting the magnetic tape by a

Abstract: The present invention provides a magnetic recording medium comprising a thin film magnetic layer of thickness in a range from 0.03 to 0.30 ?m, and having excellent surface smoothness and superior electromagnetic conversion characteristics. The magnetic recording medium comprises a lower non-magnetic layer containing at least a non-magnetic powder and a binder resin on one surface of a non-magnetic support, an upper magnetic layer containing at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, and a back coat layer on the other surface of the non-magnetic support, wherein the thickness of the upper magnetic layer is within the range from 0.03 to 0.30 ?m, the AFM surface roughness Ra of the upper magnetic layer is 6 nm or less, and the number of concavities with a depth of 30 nm or greater in the surface of the upper magnetic layer is 5 per 1 cm2 of surface area or less.

Abstract: A magnetic tape comprising: a coating layer containing ferromagnetic powder and a binder; a support; and a back layer, in this order, which satisfies the following conditions (1) to (3): (1) on a cut plane of the tape, an apex of a biggest convexity of the support does not protrude from a line connecting an apex of a biggest convexity of the coating layer and an apex of a biggest convexity of the back layer; (2) a Young's modulus in a thickness direction of a surface of the magnetic layer is from 1,000 to 2,500 kg/mm2 (from 9.8 to 24.5 GPa); and (3) a Young's modulus in a thickness direction of a surface of the back layer is from 600 to 2,000 kg/mm2 (from 5.9 to 19.6 GPa).